#include<stdio.h>
#include<unistd.h>

int g_val = 100;


int main()
{
	pid_t id = fork();
	if(id<0)
		perror("fork()");
	else if(id>0)
	{
		while(1)
		{
			printf("我是父进程：pid:%d ,ppid:%d, g_val:%d, &g_val:%p\n",getpid(),getppid(),g_val,&g_val);
			sleep(1);
		}
	}
	else
	{
		while(1)
		{
			
			printf("我是子进程：pid:%d ,ppid:%d, g_val:%d, &g_val:%p\n",getpid(),getppid(),g_val++,&g_val);
			sleep(1);
		}
	}
	return 0;
}
